CN101588521A - Sound box structure - Google Patents

Sound box structure Download PDF

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Publication number
CN101588521A
CN101588521A CNA2008100674140A CN200810067414A CN101588521A CN 101588521 A CN101588521 A CN 101588521A CN A2008100674140 A CNA2008100674140 A CN A2008100674140A CN 200810067414 A CN200810067414 A CN 200810067414A CN 101588521 A CN101588521 A CN 101588521A
Authority
CN
China
Prior art keywords
cover
loudspeaker box
shell
loud speaker
diapire
Prior art date
Application number
CNA2008100674140A
Other languages
Chinese (zh)
Inventor
陈皇妙
陈辉城
邱士嘉
潘政佳
Original Assignee
富准精密工业(深圳)有限公司
鸿准精密工业股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富准精密工业(深圳)有限公司, 鸿准精密工业股份有限公司 filed Critical 富准精密工业(深圳)有限公司
Priority to CNA2008100674140A priority Critical patent/CN101588521A/en
Publication of CN101588521A publication Critical patent/CN101588521A/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807Enclosures comprising vibrating or resonating arrangements
    • H04R1/2853Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/03Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H04M1/035Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2884Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/11Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Abstract

The invention relates to a sound box structure comprising a casing and a loudspeaker arranged in the casing, wherein a sound cavity and a containing cavity which is communicated with the sound cavity are formed in the casing, the loudspeaker is contained in the containing cavity, and the casing is made from magnesium alloy materials. In the sound box structure, because the casing is made from the magnesium alloy materials, the intensity of the casing is larger, the volume of the sound cavity in the casing can be increased, and a better low-frequency response effect is achieved so as to enhance the sounding quality of the sound box structure. In addition, the casing made from the magnesium alloy materials has favorable heat radiation performance, can shorten the time of sound delay and has a better effect of preventing the magnetic leakage of the loudspeaker.

Description

Loudspeaker box structure
Technical field
The present invention relates to a kind of loudspeaker box structure, particularly relate to a kind of loudspeaker box structure that is applied in the electronic equipment.
Background technology
Along with the fast development and the demand of people to living of science and technology, loudspeaker box structure has been widely used in the electronic equipments such as mobile phone, computer.
Loudspeaker box structure generally includes a shell and is located at the interior loud speaker of this shell.It is that structural vibration is to produce sound that this loud speaker is used for electrical signal conversion, the sounding quality of this loudspeaker box structure is except relevant with loud speaker itself, the shell outer with being located at loud speaker is also very relevant, the volume in the sound chamber in the loudspeaker box structure is big more, air in it is more little to the damping action of the sound that loud speaker sends, the lowest resonant frequency of loud speaker can be reduced like this, thereby LF-response effect preferably can be reached to promote the sounding quality of loudspeaker box structure.
At present, the shell of loudspeaker box structure is made by plastic material usually, because the intensity of plastic material is less, the inside of this shell often need be provided with ribs and support loudspeaker box structure, or the thickness of increase shell, preventing loudspeaker box structure distortion, yet the above-mentioned method that ribs is set or increases outer casing thickness all can cause the volume in the sound chamber in the shell to reduce, thereby has directly influenced the sounding quality of loudspeaker box structure.
In addition, plastic shell is easy to generate problems such as plastics shrink, distortion when ejection formation, and the heat conductivility of plastic shell is lower, the heat that produces when causing elements such as the loud speaker work in it is difficult for distributing, moreover, the sound generating standing wave that plastic shell can cause loud speaker to send disturbs, and when the signal of input loud speaker stopped, the time of sound delay time was longer.Also have, plastic shell prevents that the effect of loud speaker leakage field is also not satisfactory.
Summary of the invention
In view of this, be necessary to provide a kind of loudspeaker box structure that is applicable in the electronic equipment.
A kind of loudspeaker box structure comprises a shell and is located at the interior loud speaker of this shell, a host cavity that forms a sound chamber and be communicated with in this shell with this sound chamber, and this loud speaker is contained in this host cavity, and this shell is made by magnesium alloy materials.
In the above-mentioned loudspeaker box structure, because this shell is made by magnesium alloy materials, its intensity is bigger, the thickness that does not need ribs additionally to be set in the enclosure or to increase shell can prevent casing deformation, simultaneously owing to need not to be provided with the thickness of ribs or increase shell in this shell, thereby the volume in the sound chamber in the shell is increased, can reach preferably the LF-response effect to promote the sounding quality of loudspeaker box structure.In addition, the shell that magnesium alloy materials is made can avoid the standing wave of sound to disturb, and when the signal of input loud speaker stopped, the time of sound delay time shortened.Moreover the shell that magnesium alloy materials is made has good performance of heat dissipation, and it can distribute the heat that produces in the speaker operation process.Also have, the shell that magnesium alloy materials is made prevents that the effect of loud speaker leakage field is better.
Description of drawings
Fig. 1 is the three-dimensional assembly diagram of the loudspeaker box structure of a preferred embodiment of the present invention.
Fig. 2 is the three-dimensional exploded view of loudspeaker box structure shown in Figure 1.
Fig. 3 is the three-dimensional exploded view at another visual angle of loudspeaker box structure shown in Figure 1.
Embodiment
With reference to the accompanying drawings, be described further in conjunction with the embodiments.
Fig. 1 with Figure 2 shows that the loudspeaker box structure of a preferred embodiment of the present invention, this loudspeaker box structure comprises a shell 10 and is located at a loud speaker 30 in this shell 10.
This shell 10 is made by magnesium alloy materials, and it comprises a lower cover 11 and a loam cake 13 that combines with this lower cover 11.This lower cover 11 all is semiclosed shape with loam cake 13.
This lower cover 11 comprises a diapire 111 and a sidewall 112 that is extended to form vertically upward by the periphery of this diapire 111.This sidewall 112 surrounds with diapire 111 and forms a cavity 113, this cavity 113 comprises a sound chamber 114 and a host cavity 115 that is communicated with this sound chamber 114, this host cavity 115 is roughly rounded, to be used for accommodating loud speaker 30, be provided with a support portion 116 in this host cavity 115, this support portion 116 is crux, and it is shaped on this diapire 111, the end face of this support portion 116 is the inclined-plane, and itself and this 111 of diapires form an acute angle.Be provided with dividing plate 117 in this sound chamber 114, this dividing plate 117 is shaped on this diapire 111, and surround with this diapire 111, sidewall 112 and to form an airduct 118 that roughly is the L type, an end that is positioned at this airduct 118 on this diapire 111 is provided with a wind hole 119 (as shown in Figure 3), this diapire is run through about in the of 111 in this wind hole 119, and this airduct 118 is in communication with the outside.The top of this sidewall 112 forms a step 120, and this step 120 is high outside and low outside, engages with this loam cake 13 being used for.The end of this sidewall 112 is also recessed in this sound chamber 114, thereby forms holddown groove 121 on this lower cover 11.
Please be simultaneously with reference to Fig. 3, similar with this lower cover 11, this loam cake 13 also comprises a diapire 131 and a sidewall 132, this sidewall 132 surrounds with diapire 131 and forms a cavity 133, this cavity 133 comprises a sound chamber 134 and a host cavity 135, and this host cavity 135 is roughly rounded, to be used for accommodating loud speaker 30, in the through hole 136 that position that should host cavity 135 is provided with a circle, this through hole 136 is aimed at this loud speaker 30 on this diapire 131.The height of this sidewall 132 does not wait, the one side is higher, opposite side is lower, thereby make the cavity 133 formation cross sections in this loam cake 13 roughly be trapezoidal bar shape, make 111 of the diapires of this diapire 131 and this lower cover 11 form an acute angle, this acute angle equals the acute angle of 111 formation of diapire of the end face of support portion 116 of this lower cover 11 and this lower cover 11.The top of this sidewall 132 is provided with a step 140, and this step 140 is low inside and high outside, cooperates with the step 120 on the sidewall 112 that is used for this lower cover 11.The end of this sidewall 132 is also recessed in this sound chamber 134, thereby on this loam cake 13, form holddown groove 141, this sidewall 132 is convexly equipped with one first lug 142 to this holddown groove 141, this sidewall 132 is positioned at these host cavity 135 1 sides and also outwards is convexly equipped with two second lugs 143, these first, second lugs 143 are used for loudspeaker box structure is fixed in an electronic equipment (figure does not show) as on mobile phone, the computer, in addition, also respectively establish a rubber sheet gasket 144 on these first, second lugs 142,143 to reduce the vibration between loudspeaker box structure and the electronic equipment.
It is structural vibration to produce sound that this loud speaker 30 is used for electrical signal conversion, which is provided with some before senders 31 and the some backs senders 32 relative with these preceding senders 31.
During assembling, the step 120 on the sidewall 112 of this lower cover 11 is arranged in the step 140 on the sidewall 132 of this loam cake 13, and by the ultrasonic waves fusing mode lower cover 11 and loam cake 13 is combined.At this moment, sound chamber 114 in this lower cover 11 and the 134 common sound chambeies that form these loudspeaker box structures, the sound chamber in this loam cake 13, host cavity 115 in this lower cover 11 and the 135 common host cavities that form these loudspeaker box structures of the host cavity in this loam cake 13, this loud speaker 30 is contained in the host cavity of this loudspeaker box structure, its end that is provided with back sender 32 is resisted against on the support portion 116 in the host cavity 115 of this lower cover 11, and make the sound chamber that 32 pairs of the senders in back should this loudspeaker box structure, the other end of sender 31 was resisted against on the diapire 131 of through hole 136 outer rims of this loam cake 13 before this loud speaker 30 was provided with, and sender 31 is positioned at the through hole 136 of this loam cake 13 before making.
During work, this loud speaker 30 is sounded by preceding sender 31, back sender 32, the sound that is sent by preceding sender 31 is sent to the external world by the through hole on the loam cake 13 136, enter by the back sound that sends of sender 32 in the sound chamber of this loudspeaker box structure and produce resonance, and be sent to the external world by airduct 118 and the wind holes 119 in the lower cover 11, above-mentionedly be sent to the outside sound mutual superposition to widen the frequency band of sound by wind hole 119 and through hole 136 respectively.
In the above-mentioned loudspeaker box structure, because this shell 10 is made by magnesium alloy materials, its intensity is bigger, the thickness that ribs or increase shell 10 need additionally be set in shell 10 can prevent shell 10 distortion, in the time of also can avoiding shell to be made of plastics, the problem that is produced during its ejection formation is as plastics shrink, distortion etc.Simultaneously owing to need not to be provided with the thickness of ribs or increase shell 10 in this shell 10, thereby the volume in the sound chamber in the shell 10 is increased, help reducing the lowest resonant frequency of loud speaker 30, reach LF-response effect preferably to promote the sounding quality of loudspeaker box structure.In addition, the shell 10 that magnesium alloy materials is made can avoid the standing wave of sound to disturb, and when the signal of input loud speaker 30 stopped, the time of sound delay time shortened.Moreover the shell 10 that magnesium alloy materials is made has good performance of heat dissipation, and it can distribute the heat that produces in loud speaker 30 courses of work, avoids loudspeaker box structure because overheated and influence its sounding quality.
The data that table 1 uses Gauss's Gauss meter (Gauss Meter) to measure at distance map 1 loudspeaker box structure and traditional plastic shell loudspeaker box structure 1cm place in embodiment illustrated in fig. 3 respectively for the inventor, by experiment as can be known, the shell 10 that the present invention is made by magnesium alloy materials prevents that the shell that the effect of loud speaker leakage field is made than traditional plastic cement from promoting about 40%.
Table 1
Magnetic flux leakage (Gauss)
Fig. 1 is to loudspeaker box structure shown in Figure 3 ??0.25
Tradition has the loudspeaker box structure of plastic shell ??0.4

Claims (10)

1. a loudspeaker box structure comprises a shell and is located at the interior loud speaker of this shell, a host cavity that forms a sound chamber and be communicated with in this shell with this sound chamber, and this loud speaker is contained in this host cavity, it is characterized in that: this shell is made by magnesium alloy materials.
2. loudspeaker box structure as claimed in claim 1 is characterized in that: this shell comprises a lower cover and a loam cake that combines with this lower cover, and this lower cover and loam cake all are semiclosed shape.
3. loudspeaker box structure as claimed in claim 2 is characterized in that: sound chamber in the sidewall that this upper and lower cover includes a diapire and extended to form by the periphery of this diapire, this shell and host cavity are surrounded by the sidewall of upper and lower cover and diapire and form.
4. loudspeaker box structure as claimed in claim 3 is characterized in that: the top of the sidewall of this upper and lower cover is equipped with a step, the step that this time covers with should on the step that covers engage mutually.
5. loudspeaker box structure as claimed in claim 3 is characterized in that: this upper and lower cover is convexly equipped with a lug, a sheathed rubber sheet gasket on this lug on one of them the sidewall at least.
6. loudspeaker box structure as claimed in claim 3 is characterized in that: be provided with a support portion of support speaker in this host cavity, this support portion is shaped under this and covers, and forms an acute angle between the end face of this support portion and the diapire of this lower cover.
7. loudspeaker box structure as claimed in claim 6, it is characterized in that: the height of the sidewall of this loam cake does not wait, make between the diapire of the diapire of this loam cake and this lower cover and form an acute angle, this acute angle equals the acute angle that forms between the diapire of the end face of support portion of this lower cover and this lower cover.
8. loudspeaker box structure as claimed in claim 6 is characterized in that: cover a through hole that is provided with corresponding host cavity on this, this through hole is aimed at this loud speaker.
9. loudspeaker box structure as claimed in claim 8, it is characterized in that: the two ends of this loud speaker are respectively equipped with forward and backward sender, the end that this loud speaker is provided with the back sender is resisted against on the interior support portion of this lower cover, and the other end of sender was resisted against the outer rim of the through hole of this loam cake before this loud speaker was provided with.
10. loudspeaker box structure as claimed in claim 2, it is characterized in that: be provided with dividing plate in this sound chamber, this dividing plate is shaped under this and covers, and surrounds formation one airduct with this lower cover, this time covers in to should wherein being provided with a wind hole in the position of an end by airduct, and this wind hole is communicated with this airduct.
CNA2008100674140A 2008-05-23 2008-05-23 Sound box structure CN101588521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100674140A CN101588521A (en) 2008-05-23 2008-05-23 Sound box structure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CNA2008100674140A CN101588521A (en) 2008-05-23 2008-05-23 Sound box structure
US12/185,126 US20090288911A1 (en) 2008-05-23 2008-08-04 Sound box structure
JP2009123375A JP2009284490A (en) 2008-05-23 2009-05-21 Acoustic device

Publications (1)

Publication Number Publication Date
CN101588521A true CN101588521A (en) 2009-11-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
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US (1) US20090288911A1 (en)
JP (1) JP2009284490A (en)
CN (1) CN101588521A (en)

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CN101851717A (en) * 2010-06-14 2010-10-06 清华大学 Shell and sound producing device applying same
CN101851716A (en) * 2010-06-14 2010-10-06 清华大学 Magnesium base composite material and preparation method thereof, and application thereof in sounding device
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CN101854572A (en) * 2010-06-14 2010-10-06 清华大学 Earphone
TWI469647B (en) * 2010-06-25 2015-01-11 Hon Hai Prec Ind Co Ltd Acoustic device
TWI461068B (en) * 2010-06-25 2014-11-11 Hon Hai Prec Ind Co Ltd Acoustic device
CN103327424A (en) * 2012-03-22 2013-09-25 纬创资通股份有限公司 Speaker cabinet for electronic device
CN104349238A (en) * 2013-07-26 2015-02-11 佛山市建准电子有限公司 Handheld electronic device and sheath thereof
CN104349238B (en) * 2013-07-26 2017-10-10 佛山市建准电子有限公司 Portable electric device and its sheath
CN105376671A (en) * 2015-12-09 2016-03-02 青岛海信电器股份有限公司 Sound box and terminal
CN105376671B (en) * 2015-12-09 2019-03-26 青岛海信电器股份有限公司 A kind of speaker and terminal

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Publication number Publication date
JP2009284490A (en) 2009-12-03
US20090288911A1 (en) 2009-11-26

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